diff --git a/packages/rstream/test/pubsub.ts b/packages/rstream/test/pubsub.ts
index dc540d98a3..e921f6c3a9 100644
--- a/packages/rstream/test/pubsub.ts
+++ b/packages/rstream/test/pubsub.ts
@@ -1,7 +1,6 @@
 import { EquivMap } from "@thi.ng/associative";
 import * as tx from "@thi.ng/transducers";
 import * as assert from "assert";
-
 import * as rs from "../src/index";
 
 describe("PubSub", () => {
@@ -21,18 +20,32 @@ describe("PubSub", () => {
     });
 
     it("complex keys", () => {
-        const acc = new EquivMap();
-        const collect = { next: (x) => { let v = acc.get(x); v ? v.push(x) : acc.set(x, [x]) } };
+        const acc = new EquivMap<[string, number], [string, number][]>();
+        const collect = {
+            next: (x) => {
+                let v = acc.get(x);
+                v ? v.push(x) : acc.set(x, [x]);
+            }
+        };
         pub = rs.pubsub({ topic: (x) => x });
         pub.subscribeTopic(["a", 0], collect);
         pub.subscribeTopic(["a", 1], collect);
         pub.subscribeTopic(["b", 2], collect);
-        rs.fromIterableSync([["a", 0], ["a", 1], ["b", 2], ["a", 0], ["c", 3]]).subscribe(pub);
-        assert.deepEqual([...acc], [
-            [["a", 0], [["a", 0], ["a", 0]]],
-            [["a", 1], [["a", 1]]],
-            [["b", 2], [["b", 2]]],
-        ]);
+        rs.fromIterableSync([
+            ["a", 0],
+            ["a", 1],
+            ["b", 2],
+            ["a", 0],
+            ["c", 3]
+        ]).subscribe(pub);
+        assert.deepEqual(
+            [...acc],
+            [
+                [["a", 0], [["a", 0], ["a", 0]]],
+                [["a", 1], [["a", 1]]],
+                [["b", 2], [["b", 2]]]
+            ]
+        );
         assert.equal(pub.getState(), rs.State.DONE);
     });
 
@@ -46,7 +59,12 @@ describe("PubSub", () => {
         pub.subscribeTopic("a", collect);
         pub.subscribeTopic("b", collect);
         rs.fromIterableSync("abcbd").subscribe(pub);
-        assert.deepEqual(acc, { a: [["a", 0]], b: [["b", 1], ["b", 3]], c: [], d: [] });
+        assert.deepEqual(acc, {
+            a: [["a", 0]],
+            b: [["b", 1], ["b", 3]],
+            c: [],
+            d: []
+        });
         assert.equal(pub.getState(), rs.State.DONE);
     });
 
@@ -64,5 +82,4 @@ describe("PubSub", () => {
             done();
         }, 40);
     });
-
-});
\ No newline at end of file
+});